Atomicrays
Services
Services estimated based on license classification. Claimed businesses can customize their service list.
About the B — General Building License
A General Building (Class B) license is one of the most common contractor licenses in California. It authorizes the holder to construct, alter, or repair buildings and structures. This includes residential homes, commercial buildings, and industrial facilities. A Class B contractor can use two or more unrelated building trades on a single project, making them ideal for comprehensive construction and renovation work. They often serve as the primary contractor who coordinates subcontractors for specialized trades. When hiring a General Building contractor, homeowners should verify the license is active and in CLEAR status, confirm adequate insurance coverage, and always get a detailed written contract before work begins. General Building contractors must maintain a $25,000 contractor bond and carry workers' compensation insurance if they have employees.
About the C-7 — Low Voltage Systems License
The C-7 Low Voltage Systems license covers the installation, maintenance, and repair of systems that operate on low electrical voltage. This includes security alarms, fire detection systems, data and communication cabling, home automation, intercoms, CCTV surveillance, and structured wiring. As smart home technology and security needs continue to grow, C-7 contractors are increasingly in demand. Unlike C-10 electricians who work with standard electrical power, C-7 specialists focus on signal and data systems. This distinction is important because improper installation of low voltage systems can affect performance, void warranties, or create safety issues. When hiring a C-7 contractor, ask about their experience with your specific system type, whether they offer monitoring services, and if they stay current with rapidly evolving technology standards.
About the C10 — C10 License
A C10 (C10) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a C10 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the C36 — C36 License
A C36 (C36) licensed contractor in California is authorized to perform specialized work in their trade area. California's Contractors State License Board (CSLB) requires contractors in this classification to meet education, experience, and examination requirements before receiving their license. When hiring a C36 contractor, always verify their license is active and in CLEAR status, confirm they carry adequate insurance, and get a detailed written contract before work begins. Licensed contractors must maintain a $25,000 contractor bond and comply with all applicable building codes and regulations.
About the HAZ — Hazardous Substance Removal License
The HAZ (Hazardous Substance Removal) license covers the removal, remediation, and disposal of hazardous materials including lead paint, contaminated soil, underground storage tanks, and other environmental contaminants. This is a critical environmental and public health trade regulated by multiple state and federal agencies including Cal/EPA, DTSC, and Cal/OSHA. HAZ contractors must follow strict containment, handling, and disposal protocols to protect workers, the public, and the environment. California has some of the most stringent hazardous material regulations in the nation. When hiring a HAZ contractor, verify all required certifications, ensure they have experience with your specific type of contamination, and confirm they use licensed disposal facilities. Documentation and proper chain of custody for hazardous materials are essential.
💡 Tips for Hiring a General Building Contractor
- Always get at least three written estimates before choosing a contractor
- Verify the contractor pulls all required building permits
- Ask about their warranty policy for completed work
- Confirm they carry general liability insurance
- Never pay more than 10% or $1,000 down (whichever is less) per California law
✅ Verify This License
Always verify contractor licensing directly with the Contractors State License Board (CSLB) before hiring. You can look up license #977684 to confirm it is active and check for any complaints or disciplinary actions.
Check on CSLB.ca.gov →🏢 Are you Atomicrays?
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Claim This Page →Frequently Asked Questions
What is the difference between a Class A and Class B contractor license?
A Class A (General Engineering) license covers infrastructure projects like roads, bridges, and utilities. A Class B (General Building) license covers building construction, remodeling, and structural work on homes and commercial properties.
Can a Class B contractor do electrical or plumbing work?
A Class B contractor can coordinate subcontractors for specialty trades like electrical and plumbing. However, the actual electrical or plumbing work must be performed by appropriately licensed C-10 or C-36 subcontractors unless the B contractor also holds those specialty licenses.
What is the difference between C-7 and C-10 licenses?
A C-7 license covers low voltage systems like security, data cabling, and home automation. A C-10 license covers standard electrical work like wiring, panels, and outlets. If your project involves both, you may need contractors with each license.
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